a(n) = n^2*(n^2+1).

Terms

a(0) =0a(1) =2a(2) =20a(3) =90a(4) =272a(5) =650a(6) =1332a(7) =2450a(8) =4160a(9) =6642a(10) =10100a(11) =14762a(12) =20880a(13) =28730a(14) =38612a(15) =50850a(16) =65792a(17) =83810a(18) =105300a(19) =130682a(20) =160400a(21) =194922a(22) =234740a(23) =280370a(24) =332352a(25) =391250a(26) =457652a(27) =532170a(28) =615440a(29) =708122